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Finding the Fourth Proportional to 103,347.10, 154,984.20 and 36,789.40

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Solution

The fourth proportional to 103,347.10, 154,984.20 and 36,789.40 is: 55,171.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,347.10 : 154,984.20 = 36,789.40 : x
  2. Step 2: Convert to fraction form
    103,347.10/154,984.20 = 36,789.40/x
  3. Step 3: Cross multiply
    103,347.10x = 154,984.20 × 36,789.40
  4. Step 4: Simplify right side
    103,347.10x = 5,701,775,727.48
  5. Step 5: Solve for x
    x = 5,701,775,727.48/103,347.10
  6. Step 6: Final answer
    x = 55,171.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.